Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd572ff611af1649b88a7f7ce105fef2803a5bdd59c540bb6017d8cca14e5d240' 
  AND token = 'I8HGUo+JlcuDBGfvLy7mBiCwDPrX2e39Y0Ifgw5ifVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}